p53上调凋亡调控因子(p53 up-regulated modulator of apoptosis,PUMA)是Bcl-2蛋白家族的促凋亡成员之一,具有强大的促凋亡作用。研究发现PUMA表达水平降低与肿瘤的发生密切相关,上调肿瘤细胞中PUMA的表达可以增强肿瘤细胞对放化疗的敏...p53上调凋亡调控因子(p53 up-regulated modulator of apoptosis,PUMA)是Bcl-2蛋白家族的促凋亡成员之一,具有强大的促凋亡作用。研究发现PUMA表达水平降低与肿瘤的发生密切相关,上调肿瘤细胞中PUMA的表达可以增强肿瘤细胞对放化疗的敏感性,说明PUMA是一个非常有前景的肿瘤基因治疗靶点。本文简要综述了PUMA对人体肿瘤促凋亡作用的研究进展。展开更多
Objective: To investigated the antitumor effects of PUMA gene transfection on pancreatic cancer Aspc-1 cells. Methods: Plasmid pGFP-PUMA-C1 and pGFP-C1 was introduced into the pancreatic cancer ASPC-1 cells by Lipof...Objective: To investigated the antitumor effects of PUMA gene transfection on pancreatic cancer Aspc-1 cells. Methods: Plasmid pGFP-PUMA-C1 and pGFP-C1 was introduced into the pancreatic cancer ASPC-1 cells by LipofectinamineTm 2000 transfection. 24 h and 48 h after transfection, these cells were collected, PUMA protein and PUMA mRNA expression in ASPC-1 cells were detected by Western blot and semiquantitative reverse transcription polymerase chain reaction (RT-PCR) methods, respectively. Cell apoptosis was examined by flow cytometry and terminal deoxynucleotidyl transferase(TdT)-mediated dUTP nick end labeling (TUNEL). Growth inhibition of Aspc-1 cells was determined by the colorimetric MTT cell Viability/proliferation assay. Results: Transfection of pGFP-PUMA-C 1 into Aspc-1 cells resulted in the upregulation of the corresponding mRNA and PUMA protein, which was associated with a reduced number of viable cells and increased number of apoptosis cells, but the mRNA and PUMA protein and the corresponding viable cells and apoptosis cells had no significant differences in Aspc-1 cells/pGFP-C1 compared to control cells. Conclusion: Re-expression of PUMA gene, which is lost in human pancreatic cancer cells, can induce apoptosis, resulting in inhibition of tumor growth.展开更多
目的研究在γ射线诱导下PUMA基因(p53 up-regulated modulator of apoptosis)在人前列腺癌细胞(p53野生型LNCaP细胞、p53变异型PC-3细胞)中的作用效果。方法采用MTT方法检测在3、5、8Gy照射剂量的γ射线诱导下人前列腺癌细胞的抑制率;采...目的研究在γ射线诱导下PUMA基因(p53 up-regulated modulator of apoptosis)在人前列腺癌细胞(p53野生型LNCaP细胞、p53变异型PC-3细胞)中的作用效果。方法采用MTT方法检测在3、5、8Gy照射剂量的γ射线诱导下人前列腺癌细胞的抑制率;采用RT-PCR的方法检测在3、5、8Gy照射剂量的γ射线诱导下PUMA基因的表达情况。结果在γ射线诱导下LNCaP细胞抑制率较PC-3细胞抑制率高(P<0.01);随γ射线照射剂量的增加,LNCaP细胞中PUMA-mRNA的表达越明显(P<0.05)。结论γ射线诱导下PUMA基因可促使人前列腺癌LNCaP细胞凋亡。展开更多
目的探讨外源性PUMA(p53up-regulated modulator of apoptosis)基因对人乳头瘤病毒(HPV)阳性宫颈癌放疗敏感性的影响。方法以重组腺病毒为载体,将PUMA基因导入HPV阳性宫颈癌细胞HeLa和CaSki。应用MTT法比较携带PUMA的复制缺陷型重组腺病...目的探讨外源性PUMA(p53up-regulated modulator of apoptosis)基因对人乳头瘤病毒(HPV)阳性宫颈癌放疗敏感性的影响。方法以重组腺病毒为载体,将PUMA基因导入HPV阳性宫颈癌细胞HeLa和CaSki。应用MTT法比较携带PUMA的复制缺陷型重组腺病毒(Ad-PUMA)和携带野生型p53基因的复制缺陷型重组腺病毒(Ad-p53)对HeLa和CaSki细胞增殖的影响,平板克隆方法检测Ad-PUMA与X射线联合应用后对细胞生长的影响,并通过DAPI染色、流式细胞检术检测细胞凋亡情况。Western Blot法检测X射线处理后HeLa细胞PUMA表达。结果(1)Ad-PUMA能够明显抑制HeLa和CaSki细胞增殖,增加细胞凋亡,而Ad-p53对细胞生长无明显抑制作用。(2)X射线能够诱导HeLa细胞PUMA表达升高,具有时间和剂量效应。(3)Ad-PUMA与X射线联合应用后可显著增加细胞凋亡,减少平板克隆形成数,但Ad-PUMA对X射线引起的G2期阻滞无明显影响。结论PUMA在放射线诱导肿瘤细胞凋亡的过程中发挥作用。Ad-PUMA抑制宫颈癌细胞增殖,诱导细胞凋亡。Ad-PUMA与X射线联合应用后显著提高宫颈癌细胞放疗敏感性。展开更多
目的构建p53正向凋亡调节因子重组腺病毒(Ad-PUMA)载体,探讨Ad—PUMA对人体内外胰腺癌的治疗作用。方法利用Ad—Easy系统在大肠杆菌同源重组,构建Ad—PUMA腺病毒载体,在293细胞内成功包装并鉴定后,以Ad-PUMA转染人转移胰腺癌细胞...目的构建p53正向凋亡调节因子重组腺病毒(Ad-PUMA)载体,探讨Ad—PUMA对人体内外胰腺癌的治疗作用。方法利用Ad—Easy系统在大肠杆菌同源重组,构建Ad—PUMA腺病毒载体,在293细胞内成功包装并鉴定后,以Ad-PUMA转染人转移胰腺癌细胞株AsPC-1。用MTT法检测转染前后存活细胞,观察Ad.PUMA的体外抑瘤作用;用Western blot方法鉴定转染前后AsPC-1细胞内PUMA蛋白表达。通过裸鼠皮下胰腺癌移植瘤模型观察Ad-PUMA的体内抑瘤效果;Western blot方法鉴定Ad—PUMA转染后肿瘤组织内PUMA蛋白表达,TUNEL(terminal deoxynucleotidyl transferase biotin—dUTP nick end labeling)法检测肿瘤组织细胞凋亡。结果在体外,随着Ad—PUMA感染剂量增加,细胞内PUMA蛋白表达逐渐增加,细胞存活率逐渐下降;在体内,Ad—PUMA可显著抑制裸鼠皮下肿瘤的生长,其抑瘤率为44.2%,瘤体组织PUMA表达水平及凋亡指数明显升高。结论PUMA抑制体内外胰腺癌细胞增殖,可能是-种潜在的肿瘤生物治疗手段。展开更多
文摘p53上调凋亡调控因子(p53 up-regulated modulator of apoptosis,PUMA)是Bcl-2蛋白家族的促凋亡成员之一,具有强大的促凋亡作用。研究发现PUMA表达水平降低与肿瘤的发生密切相关,上调肿瘤细胞中PUMA的表达可以增强肿瘤细胞对放化疗的敏感性,说明PUMA是一个非常有前景的肿瘤基因治疗靶点。本文简要综述了PUMA对人体肿瘤促凋亡作用的研究进展。
文摘Objective: To investigated the antitumor effects of PUMA gene transfection on pancreatic cancer Aspc-1 cells. Methods: Plasmid pGFP-PUMA-C1 and pGFP-C1 was introduced into the pancreatic cancer ASPC-1 cells by LipofectinamineTm 2000 transfection. 24 h and 48 h after transfection, these cells were collected, PUMA protein and PUMA mRNA expression in ASPC-1 cells were detected by Western blot and semiquantitative reverse transcription polymerase chain reaction (RT-PCR) methods, respectively. Cell apoptosis was examined by flow cytometry and terminal deoxynucleotidyl transferase(TdT)-mediated dUTP nick end labeling (TUNEL). Growth inhibition of Aspc-1 cells was determined by the colorimetric MTT cell Viability/proliferation assay. Results: Transfection of pGFP-PUMA-C 1 into Aspc-1 cells resulted in the upregulation of the corresponding mRNA and PUMA protein, which was associated with a reduced number of viable cells and increased number of apoptosis cells, but the mRNA and PUMA protein and the corresponding viable cells and apoptosis cells had no significant differences in Aspc-1 cells/pGFP-C1 compared to control cells. Conclusion: Re-expression of PUMA gene, which is lost in human pancreatic cancer cells, can induce apoptosis, resulting in inhibition of tumor growth.
文摘目的研究在γ射线诱导下PUMA基因(p53 up-regulated modulator of apoptosis)在人前列腺癌细胞(p53野生型LNCaP细胞、p53变异型PC-3细胞)中的作用效果。方法采用MTT方法检测在3、5、8Gy照射剂量的γ射线诱导下人前列腺癌细胞的抑制率;采用RT-PCR的方法检测在3、5、8Gy照射剂量的γ射线诱导下PUMA基因的表达情况。结果在γ射线诱导下LNCaP细胞抑制率较PC-3细胞抑制率高(P<0.01);随γ射线照射剂量的增加,LNCaP细胞中PUMA-mRNA的表达越明显(P<0.05)。结论γ射线诱导下PUMA基因可促使人前列腺癌LNCaP细胞凋亡。
文摘目的探讨外源性PUMA(p53up-regulated modulator of apoptosis)基因对人乳头瘤病毒(HPV)阳性宫颈癌放疗敏感性的影响。方法以重组腺病毒为载体,将PUMA基因导入HPV阳性宫颈癌细胞HeLa和CaSki。应用MTT法比较携带PUMA的复制缺陷型重组腺病毒(Ad-PUMA)和携带野生型p53基因的复制缺陷型重组腺病毒(Ad-p53)对HeLa和CaSki细胞增殖的影响,平板克隆方法检测Ad-PUMA与X射线联合应用后对细胞生长的影响,并通过DAPI染色、流式细胞检术检测细胞凋亡情况。Western Blot法检测X射线处理后HeLa细胞PUMA表达。结果(1)Ad-PUMA能够明显抑制HeLa和CaSki细胞增殖,增加细胞凋亡,而Ad-p53对细胞生长无明显抑制作用。(2)X射线能够诱导HeLa细胞PUMA表达升高,具有时间和剂量效应。(3)Ad-PUMA与X射线联合应用后可显著增加细胞凋亡,减少平板克隆形成数,但Ad-PUMA对X射线引起的G2期阻滞无明显影响。结论PUMA在放射线诱导肿瘤细胞凋亡的过程中发挥作用。Ad-PUMA抑制宫颈癌细胞增殖,诱导细胞凋亡。Ad-PUMA与X射线联合应用后显著提高宫颈癌细胞放疗敏感性。
文摘目的构建p53正向凋亡调节因子重组腺病毒(Ad-PUMA)载体,探讨Ad—PUMA对人体内外胰腺癌的治疗作用。方法利用Ad—Easy系统在大肠杆菌同源重组,构建Ad—PUMA腺病毒载体,在293细胞内成功包装并鉴定后,以Ad-PUMA转染人转移胰腺癌细胞株AsPC-1。用MTT法检测转染前后存活细胞,观察Ad.PUMA的体外抑瘤作用;用Western blot方法鉴定转染前后AsPC-1细胞内PUMA蛋白表达。通过裸鼠皮下胰腺癌移植瘤模型观察Ad-PUMA的体内抑瘤效果;Western blot方法鉴定Ad—PUMA转染后肿瘤组织内PUMA蛋白表达,TUNEL(terminal deoxynucleotidyl transferase biotin—dUTP nick end labeling)法检测肿瘤组织细胞凋亡。结果在体外,随着Ad—PUMA感染剂量增加,细胞内PUMA蛋白表达逐渐增加,细胞存活率逐渐下降;在体内,Ad—PUMA可显著抑制裸鼠皮下肿瘤的生长,其抑瘤率为44.2%,瘤体组织PUMA表达水平及凋亡指数明显升高。结论PUMA抑制体内外胰腺癌细胞增殖,可能是-种潜在的肿瘤生物治疗手段。